Indoor Controller Block Diagram (Mcc-1744); In Case Of Connection Of Wired Remote Controller - Toshiba MMU-UP0051MH-E(TR) Service Manual

8-2. Indoor controller block diagram (MCC-1744)

8-2-1. In case of connection of wired remote controller

Indoor unit
#1 (Header)
Indoor control P.C. board
(MCC-1744)
DC20V
DC5V
DC12V
Power
circuit
Drain
pump
Indoor
fan motor
Transformer
Wired header remote controller
(Up to 2 units)
Display LCD
CPU
Display LED
Remote controller
communication circuit
A B
Remote controller
communication circuit
Driver
CPU
Outside
output
Operation
Alarm
Defrost
Thermostat OFF
Cooling
Heating
Fan
Fan motor
relay circuit
AC synchronous
signal input circuit
L N
Power supply
220 - 240V~, 50Hz
220V~, 60Hz
Function setup
Key switch
CN2
CN1
DC5V
Power
circuit
* 1
TA sensor
TC1 sensor
TC2 sensor
TCJ sensor
Float input
HA
BUS
communication
circuit
Uv (U1) Uv (U2)
Uv (U1) Uv (U2)
Outdoor unit
– 55 –
Schedule timer (weekly timer mode)
LCD
Display
driver
LCD
Function setup
CPU
DC5V
Key switch
Power
Secondary
circuit
battery
#2
(Follower)
A
Same
as left
Power
supply
Max.8 or 16 units are connectable.
(depending on connection system)
*1 The schedule timer can be connected
to only RBC-AMT∗∗∗.
#3
(Follower)
B A B
Same
as left
Power
supply
Outdoor
Outdoor
unit
unit